| http://www.w3.org/ns/prov#value | - The oldest Greek philosophers were at the same time investigators of nature: Thales, a geometrician, fixed the year at 365 days, and is said to have predicted a solar eclipse. ??? Anaximander constructed a sun clock, a kind of map (perimetron) of land and sea, and various astronomical instruments. ??? Pythagoras was a mathematician.
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